EP1234784A1 - Sealing device for the annular space between a container internal wall of a vertical cylindrical container for fluid and the floating roof - Google Patents

Abstract

The system for sealing the annular space between the wall (2) of a tank and its floating roof (5) comprises a sealing ring (11). This is attached to pivoting arms (12) which are supported by springs (17) and attached to the roof and move to ensure that the gap is sealed when it moves.

Description

The present invention relates to a device for sealing the annular gap between a container inner wall of a vertical round container intended for a liquid and a floating blanket, with a circumferential, attached to the inner wall of the container sealing ring, with a number lining up in the container circumferential direction Sliding / sealing body with sealing surfaces extending in the vertical direction, with at least one circumferential, the annular gap between the sealing ring and an outer wall the floating membrane bridging sealing membrane and with a variety on the circumference of the distributed floating cover and attached to this pressure units that the span the variable annular gap and the sealing ring at least on a first Press against the inner wall of the container, at least some of these pressure units have at least one base arm, which is arranged obliquely in the annular gap, extends between the sealing ring and the outer wall of the floating ceiling and at least on is in contact with the sealing ring or the outer wall of the floating ceiling and its angular position to the sealing ring changes when changing the annular gap width, the pressure of the Sealing ring is supported by at least one first spring element and being the first The spring element and the base arm are connected to one another in such a way that as the space becomes narrower Annular gap, the pressure force against the sealing ring is increased.

Such sealing arrangements are mainly found in large containers manufactured on site with vertical axis use, also as floating roof tanks or fixed roof tanks be designated. Such containers have a floating blanket by the Liquid is carried and which rises with the changing liquid level or decreases. The to seal the annular gap between the container wall and the edge of the Floating blanket sealing arrangements are used by the floating blanket worn by myself. Due to container ovalities and the eccentric floating position of the Floating blanket can be designed as a centrally designed annular gap floating roofs from about 150 to 300 mm to real annular gap widths in practice with extreme tank ovalities and an eccentric floating position of 500 to 600 mm.

The sealing arrangement used does not only have the task that is in vertical and horizontal movement of the floating cover occurring variable gap effectively seal, but at the same time the floating blanket itself against the container jacket to center.

As far as spoken in the present description of floating blanket, so are including, on the one hand, indoor floating ceilings of fixed roof tanks and, on the other To understand floating roofs of floating roof tanks.

• Trag- und Andruckeinheiten
• ein behälterwandseitig anliegendes, ringförmig geschlossenes Kontaktelement, z.B. in der Form von Gleitblechen
• mindestens eine, den Ringspalt zwischen Kontaktelement und Schwimmdecke überspannende, flexible Dichtungsmembran.

Sealing arrangements of the type under consideration essentially comprise three basic elements:

• Support and pressure units
• a ring-shaped, closed contact element on the container wall, for example in the form of sliding plates
• at least one, flexible sealing membrane spanning the annular gap between the contact element and the floating cover.

From US-PS 2,892,795 a carrying and pressing device is known which consists of a four-armed, weight-loaded pressure scissors, which are used for sealing and centering of floating blankets can be used. In this pressure scissors, a rod extends from a lower edge of the floating blanket diagonally upwards to that on the inside wall of the tank adjacent sliding plate. A second rod extends from the top edge of the Swim blanket sloping downward and is at the intersection with the first rod articulated. This second rod is then at a right angle to the container axis angled towards and carries at its lower end a weight that acts the force of gravity spreads this scissor assembly and thus the sliding plate or Press the sealing ring against the inside wall of the container. The change in the pressing forces of this The arrangement of scissors as the annular gap becomes narrower is degressive and leads to unsatisfactory centering of the swimming sheet. Also a pressure is on the level of the liquid level is not provided.

Another seal arrangement with individual pressure and support elements is from the U.S. Patent 3,565,279 known. The parts of the individual pressure and support elements are in Form of V or semi-circular leaf springs built up halfway along the edge the floating roof are attached; the vertically extending upper spring arm section is screwed to the sliding and sealing body, while the downward extending lower spring arm section slidably abuts the sliding and sealing body. This V-shaped Suspension spring can meet the requirements placed on such a support and pressure device will not meet, especially for large annular gap widths; it is suitable in essential only for small changes in the annular gap based on the width of the annular gap, for which it is designed for. The force curve of the simple leaf spring is when reducing the annular gap degressive, which leads to insufficient centering of the floating cover.

US Pat. No. 3,261,496 shows a sealing arrangement in which the individual support and pressure devices press a sliding plate of low height against the container wall and also carry a weather plate in the desired position over the ring gap. This The arrangement has a type of Y-shaped spring. As the lower pressure of the slide plate another, separately arranged leaf spring is used. This structure is so disadvantage that it is designed very stiff and the pressure springs too large forces exercise. The Y-shaped spring combination only presses against the upper end of the slide plate and, because it is firmly connected to the edge of the sliding plate, causes a deformation of the sliding plate with changing annular gap widths. One arm of the spring combination which slidably abuts the container wall with an angled section and with its free end carries the weather plate, due to the friction on the Container wall are damaged and then loses its support function for the weather plate. If this angled bend piece gets caught on the container wall the entire construction will be destroyed. Furthermore, this carrying and pressing device no large changes in the annular gap, in the area of which an effective seal can be done.

Finally, a sealing arrangement is made using a three-armed pressure shear known, the scissors by a arranged in their center and against a support arm supporting coil spring is tensioned. The pressing of the Sliding plate in a second, lower area is made by additional, V-shaped spiral springs. Such an arrangement forms the preamble of claim 1. The effect of relatively small coil spring is low and the pressing forces of the scissors are only on directed a point. The increase in force of the spiral coil spring when the gap is reduced is slightly degressive and the force curve of the additional leaf spring is strongly degressive. It follows that this sealing arrangement with a relatively high effort for the pressure system does not provide a favorable force distribution against the sealing ring.

There are also various sealing arrangements with one-armed and unbranched leaf springs known from spring bars and spring sheets, with in addition to straight and angled spring arms hook-shaped or S-shaped and U-shaped spring shapes can be used. However, all of the springs mentioned have a degressive force curve when the annular gap is reduced and contribute insufficiently to roof centering. Furthermore, the relatively slim spring support elements often have insufficient buckling and buckling strength, which appropriate sealing devices with large gap widths or high frictional forces often destroyed by dents or kinks.

The invention has for its object a device for sealing the annular gap of the type mentioned in such a way that the disadvantages mentioned above be avoided, and in particular high centering forces with a progressive increase in force with reduction of the annular gap, high buckling and buckling stability as well as support capacity have large annular gaps and which can be produced at low cost.

This object is achieved by a device for sealing the annular gap between a container inner wall of a round container intended for a liquid and one Floating blanket according to the features of claim 1. The device is thereby characterized in that the at least one first spring element at least part of a the first pressure arm, which forms the sealing ring at a second point, that of the first Is spaced, presses against the container wall that the first pressure arm with the Base arm is non-positively connected and the angular direction and length of the first pressure arm are dimensioned such that the first pressure arm with all annular gap widths extends in relation to the base arm in the opposite direction to the sealing ring and slidably engages the sealing ring, and the base arm being changed by changing the annular gap performs a rotational movement in a first direction of rotation and the first pressure arm one Rotational movement in a second direction of rotation opposite to the first direction of rotation performs.

• Es können hohe Zentrierungkräfte mit progressivem Kraftanstieg bei geringer Spaltverkleinerung erhalten werden.
• Die beiden Stellen, an denen der Basisarm einerseits und das mindestens erste Federelement andererseits an die Gleit- und Dichtkörper andrücken, können weit voneinander beabstandet werden, was eine ausgezeichnete Verteilung der Andruckkräfte mit sich bringt.
• Durch den Basisarm wird eine Grundstabilität und damit auch eine Beul- und Knickstabilität erreicht.
• Die Anzahl der benötigten Konstruktionselemente kann gering gehalten werden, woraus sich geringe Herstellkosten ergeben.

The following advantages are achieved in particular with such an arrangement:

• High centering forces with a progressive increase in force with little gap reduction can be obtained.
• The two points at which the base arm on the one hand and the at least first spring element on the other press against the sliding and sealing bodies can be spaced far apart, which brings about an excellent distribution of the pressing forces.
• The base arm provides basic stability and thus also buckling and buckling stability.
• The number of construction elements required can be kept low, resulting in low manufacturing costs.

As a particular advantage of the arrangement according to the invention, it should be emphasized that the spring and centering forces not only due to the changing spring tension an annular gap reduction, but also due to the changing Position of the base arm, which is inclined in the annular gap between the swimming sheet and Sealing ring runs. The base arm on which the spring element is held exerts a torque on the spring arm, such that when the gap becomes smaller, the change in position of the base arm additionally prestresses the spring arm. The branching to each other Elements, i.e. the base arm and the first spring element, which is at least part of a forms the first pressure arm, get a different one when reducing the annular gap Sense of rotation and tension each other. The torques are in horizontal forces converted.

Furthermore, additional spring bars can be provided and designed so that they from a certain ring gap reduction, additional spring forces through elastic to cause plastic deformation. To increase the spring action of the spring arms, you can the ends of the spring bars are rolled up under a certain radius.

The individual spring elements can run straight or also one or more times be angled. These spring elements are each with other straight or angled Bars firmly connected to a carrying and / or pressing device and functional combined.

In a preferred embodiment, a second spring element is provided, which at least forms part of a second pressure arm which is non-positively connected to the base arm connected is. The angular direction and length of the second pressure arm becomes such dimension that the second pressure arm in relation to the Base arm extends in the opposite direction to the outer wall of the floating ceiling and attacks on it. This structure has the advantage that the pressure forces of the Base arms on the sealing ring can be easily increased.

A first spring element and a second spring element are advantageously approximately in attached to the base of the middle of the annular gap. This results in a compact Construction and high pressure forces at low pressure device costs.

Both the first and the second pressure arm are expediently used as spring bars educated.

Alternatively, the first and / or the second pressure arm can be rigid Include arm part and a resilient arm part. By dividing the pressure arm can further useful spring elements, such as spiral springs or torsion spring bars, come into use.

The first spring element and the second spring element can simplify a continuous Form spring arm, which is attached approximately in the middle of the spring arm in the middle of the base arm. One end of the continuous spring arm is then supported against the sealing ring and that the other end of the spring arm presses against the outer wall of the floating ceiling. This arrangement brings further advantages of spring design and fastening as well as cost advantages.

In order to increase the spring forces, a cross member can be provided with its Center and is attached at right angles to the base arm. This cross section serves as Carrier to the first and / or the second spring element at the two ends of the cross member and a corresponding to this first and / or this second spring element to attach another first and / or second spring element. With this arrangement the spring elements, arranged on both sides of the base arm, are doubled.

The base arm can also be designed as a spring bar, provided the size of the Changes in the annular gap and the magnitude of the vertical forces to be expected enable one safe dimensioning of the base arm.

With vertical alignment of the pressure device and especially when using more rigid The pressure arms can be used for vertical support at the same time as the base arms the sealing arrangement can be used.

When the pressure device is aligned horizontally and spring pressure arms are used the transmission of vertical forces requires a stronger dimensioning of the pressure springs and a special bracket for the movable spring arms ahead.

A bending knee in the form of a U-shaped, resilient arm part can be provided on the base arm be, the free end of the bending knee on the sealing ring or the The outer wall of the floating ceiling is attached. Such a bending knee forms a kind of resilient, a spring force exerted on the sealing ring hinge, which is always tight ring gap.

In order to effectively limit the minimum of the annular gap width, the free end of the resilient pressure arm can be rolled up semicircular. The diameter of the semicircle should be larger than the smallest, desired or expected annular gap width, thus a strong centering force from the curled in before the smallest annular gap width is reached Spring end runs out.

The end sliding against the sealing ring or the outer wall of the floating ceiling the pressure arm can be guided through a safety catch, such a safety catch is attached to the sealing ring or the outer wall of the floating ceiling in a way and way that the pressure arm in its movement perpendicular to its longitudinal axis is fixed and can move in the direction of its longitudinal axis. Through such The safety catch ensures that vertical forces are exerted between the sealing ring by the pressure arms and floating blanket can be transferred.

The first and the second pressure arm can have two legs of an X-shaped arrangement form, the two other legs of the X-shaped arrangement then the base arm form. In addition, a pressure arm and a base arm leg can be used in such a structure form a V-shaped unit, the legs of the one unit the Seal ring and the legs of the other unit of the floating ceiling outer wall be assigned. Such arrangements lead to particularly compact and inexpensive designs of the pressure units.

Two X-shaped pressure units can also be arranged one directly behind the other in their longitudinal axis be arranged, the two adjacent to the outer wall of the floating ceiling Spring arms have a connecting web and the attachment of the two pressure units with the floating ceiling outer wall on the connecting web. This XX-shaped Arrangement is suitable for horizontal arrangement in the annular gap and allows one space-saving arrangement.

Furthermore, it is possible to have two X-shaped pressure units directly behind one another in their longitudinal axis to be arranged, the respectively adjacent spring arms on the floating ceiling outer wall and each have a connecting web on the sealing ring and the Fastening the pressure units with the floating blanket on the floating ceiling side The connecting web is made and the connecting web on the sealing ring in a safety catch is led. This arrangement is preferred if the horizontally arranged Pressure unit should transmit vertical forces.

The spring bars, as mentioned above, can be made of spring-hard steel strip are and preferably have a thickness between 2-3 mm.

Figur 1

einen Ausschnitt eines Rundbehälters im Bereich dessen Wand sowie einen Teil der auf dem Flüssigkeitsspiegel aufschwimmenden Schwimmdecke, gemäß einer ersten Ausführungsform einer Vorrichtung zum Abdichten des Ringspalts zwischen Behälterinnenwand und Schwimmdecke,

Figur 2

eine weitere Vorrichtung zum Abdichten des Ringspalts entsprechend einer zweiten Ausführungsform in einer perspektivischen Ansicht,

Figur 3

eine Darstellung, entsprechend der Figur 1, einer dritten Ausführungsform einer Vorrichtung zum Abdichten des Ringspalts,

Figur 4

eine weitere Schnittdarstellung, die eine vierte Ausführungsform zeigt,

Figur 5

eine wiederum perspektivische Darstellung mit einer fünften Ausführungsform,

Figur 6

eine sechste Ausführungsform in einer Schnittdarstellung,

Figur 7

eine siebte Ausführungsform, wobei gegenüber den Ausführungsformen in den Figuren 1 bis 6 die Trag- und Andruckteile horizontal in dem Ringspalt verlaufen,

Figur 8

eine Ansicht auf den Ringspalt, von oben gesehen, mit horizontal im Ringspalt angeordneten, X-förmigen Andruck- und Trageinheiten gemäß einer siebten Ausführungsform, und

Figur 9

eine Anordnung, die mit der Ausführungsform, die in Figur 8 dargestellt ist, vergleichbar ist, allerdings geringfügig modifiziert, gemäß einer achten Ausführungsform.

Further details of the invention result from various examples, which are described below with reference to the drawings. Show in the drawings

Figure 1

a section of a round container in the region of its wall and a part of the floating ceiling floating on the liquid level, according to a first embodiment of a device for sealing the annular gap between the inner wall of the container and the floating ceiling,

Figure 2

2 shows a further device for sealing the annular gap in accordance with a second embodiment in a perspective view,

Figure 3

1 shows a representation, corresponding to FIG. 1, of a third embodiment of a device for sealing the annular gap,

Figure 4

5 shows a further sectional illustration, which shows a fourth embodiment,

Figure 5

FIG. 3 shows another perspective illustration with a fifth embodiment,

Figure 6

6 shows a sixth embodiment in a sectional view,

Figure 7

7 shows a seventh embodiment, the supporting and pressing parts running horizontally in the annular gap compared to the embodiments in FIGS. 1 to 6,

Figure 8

a view of the annular gap, seen from above, with horizontally arranged in the annular gap, X-shaped pressure and support units according to a seventh embodiment, and

Figure 9

an arrangement that is comparable to the embodiment shown in Figure 8, but slightly modified, according to an eighth embodiment.

A device for sealing the annular gap between a container wall 2 a Round container 1, which is filled with a liquid 3, and one above the liquid level, designated with the reference number 4, floating floating blanket 5 is shown in Figure 1. In this floating blanket 5 there is the edge area of the Floating blanket made of a typical ring pontoon, consisting of a lower floor 6, a upper floor 7 and a floating ceiling outer wall 8 is constructed.

The floating blanket 5 is dimensioned with respect to its diameter so that between the floating ceiling outer wall 8 and the container wall 2 remain an annular gap 9. This annular gap 9 is required so that the floating cover 5 among the different Liquid levels 4 can freely float up and down. To the respective Centering the floating blanket 5 in the different positions, in the annular gap, distributed around the vertically aligned floating ceiling outer wall 8, individual Sealing arrangements, designated 10, arranged a sealing ring 11, also as Designated sliding plate, press against the inside of the container wall 2. This sealing ring 11 lies flat against the inner wall of the round container 1.

Such a sealing arrangement 10 comprises a support arm or base arm 12, which is from the center of the floating ceiling outer wall 8 obliquely upwards over the annular gap 9 extends to the upper region of the sliding plate 11. This base arm 12 is on the Floating ceiling outer wall 8 and the sliding plate 11 each arranged there Bearing bracket 13 or support bracket 15 and an axis 14 or 16 in the form of a Bar held, the respective axis 14, 15 in a vertically aligned Slightly move the slot. On the base arm 12 is on a cross member 18 first pressure arm 17 fastened by means of screw connection 19. This attachment point on the cross member 18 is located at the lower end of the base arm 12 near the bracket 13. The first pressure arm 17 itself is made of a first spring element 17a extends to the lower area of the sealing ring 11 and extends there with a skid Bent end 17b creates, and two arcuate spring parts 17c and 17d constructed in the area of the screw connection 19. The two arcuate spring parts 17c and 17d form a clockwise or clockwise rotation Loop or indentation, which is a corresponding bias of the first spring element 17a exercises. This first pressure arm 17 is made of a spring-hard steel strip, preferably with a thickness of about 2 mm and a width of 40 to 80 mm.

As can be seen from the structure of the arrangement 10, as the Annular gap 9, i.e. when the floating ceiling outer wall 8 is closer to the container wall 2 moved towards, the pressure force by the changed position of the first pressure arm 17 of the skid-shaped bent end 17b on the lower part of the sealing ring 11 elevated; at the same time, however, when the base arm 12 is erected, a torque in the arcuate Spring parts 17c and 17d generated, which via the cross member 18 on the base arm 12 is transmitted and causes a pressure force against the support bracket 15.

As can be seen from FIG. 1, this V-shaped arrangement is shown of the base arm 12 and the first pressure arm 17 a pressure force of the sliding plate 11 both in the upper area of the sliding plate 11 and in the lower area at height of the liquid level 4 obtained. This creates a very simple design of the Support and pressure unit with two pressure areas on the sliding plate 11.

Since the arrangement shown in FIG. 1 is an open one on its upper side Round container is, the annular gap 9 is in the upper area with a sealing membrane 20 sealed at the upper edge of the sliding plate 11 with a clamping profile 21 with a Screw connection 22 and at a floating ceiling edge bracket 25 with a Clamp profile 23 and a screw connection 24 is attached.

FIG. 2 shows a further embodiment of a sealing arrangement, designated 30, shown.

As far as in the individual embodiments, as they follow with reference to Figures 2 to 9 are described, components and parts are used in the respective Figures are identical or comparable, the same reference numerals are used, so that the comments on these parts and elements given to the one figure are, can be transferred to the corresponding other figures.

The sealing arrangement 30 of FIG. 2 has a base arm 32 which is the base arm 12 in FIG. 1 corresponds and accordingly obliquely in the annular gap 9 from the lower region the floating ceiling outer wall 8 runs in the direction of the container wall 2. The The sliding plate, designated 31 in FIG. 2, is only approximately half the height of the outer swimming pool wall 8 dimensioned accordingly. At the top edge 31a, the inside is angled, a sealing membrane 42 closes, which bears against the container wall 2 and backed by a foam cushioning element 43 and by a receiving profile 40 is worn. At the upper edge 40a, the sealing membrane 20 is by means of Clamp profile 44 and screw connection 45 held. In the middle of the base arm 32 is a Cross member 18 attached, each with a left and a right section evenly overhangs the base arm 32, perpendicular to it. At each end this cross member 18 is a downwardly extending first spring arm 37 and an upwardly extending second spring arm 38 is arranged. The first one Spring arm 37 and the respective second spring arm 38 are connected via an intermediate piece 39, formed in one piece, connected, the attachment to this intermediate piece 39 the cross member 19 by means of screw connections 19. Cross the spring arms 37 and 38 with the angular direction of the base arm 32, the first spring arms 37 on the Sliding plate 31 rest in the area of the liquid level 4 and the sliding plate to the Press on container wall 2 while the two spring arms 38 are in the upper area of the Fit the floating ceiling outer wall 8. In Figure 2 are the two sections of the base arm 32, which extend on both sides of the cross member 18, designated 32a and 32b. According to the embodiment in FIG. 1, the two ends of the base arm are by means of support bracket 15 and axis 16 on the receiving profile 40 and by means of a pedestal 13 and axis 14 attached to the lower region of the outer wall 8 of the floating ceiling.

Viewed from the side projection, the base arm 32 forms with its two sections 32a and 32b and the spring arms 37 and 38 an X-shaped arrangement. It is recognizable that when the annular gap 9 narrows, the base arm 32 its angular position changed so that it is steeper in the annular gap 9, whereby a Rotational movement is exerted on the cross member 18 and the spring arms 37 and 38 Experience torque and be biased clockwise. Experience at the same time the spring arms 37 and 38 an additional tension due to the tightening Annular gap 9, so that they are also slanted in the annular gap. The increased spring tension is in turn transmitted to the base arm 32 via the cross member 18. Consequently are all horizontally effective reaction forces at the end points when reducing the annular gap the spring arms 37 and 38 and the base arm (32a and 32b) enlarged and the Centering forces for the free floating floating blanket 5 increased. Because of the double Preload measure - changing the angle of the base arm and reducing the annular gap - A progressive increase in the spring forces is achieved with reduction of the annular gap.

In the third embodiment, which is shown in FIG. 3, for the sealing arrangement, which is designated 60, a base arm 62 obliquely in the annular gap 9 of the Outside of the floating ceiling 8 up to a fastening point with a support bracket 15 and axis 16 used continuously. The lower end of the base arm 62 is in shape a runner 62c and is formed in a vertical U-guide profile 63 led that the skids 62c move in the vertical direction within the U-profile 63 can. With the base arm 62, approximately in the middle thereof, via an axis 70 (the two Sections of the base arm 62 on both sides of the axis 70 are denoted by 62a and 62b), a rod-shaped scissor suspension element 67 articulated, which with its upper End in the area of the upper edge of the floating ceiling outer wall 8 on a bearing block 68 is held by means of axis 69. The base arm 62 with its two leg sections 62a and 62b and the scissor suspension element 67 form in the side view, as shown in Figure 3, a Y-shaped arrangement. In the middle of the base arm 62 between the two sections 62a and 62b, at the level of the axis 70, is a cross member 18 attached. This cross member is, as shown in the embodiment of Figure 2, on both sides of the base arm 62 in front of this. At both ends of this cross member 18 via an intermediate piece 72, a downwardly and obliquely to the sealing ring 11 first spring arm 71 and an up and to the floating ceiling outer wall 8 extending second spring arm 73 fastened, only in FIG front spring arm arrangement consisting of sections 71, 72 and 73 can be seen is. The respective ends of the first spring arm 71 and the second spring arm 73 are rolled up or designed as skids; the rolled end of the first spring arm 71 is denoted by 71b. The principle of this scissor arrangement is based on that with changing, narrowing ring gap both by changing the Angular position of the base arm 62 and by reducing the annular gap 9 each a biasing component of the spring arms 71 and 73 is effected and horizontally effective forces at all end points of the spring arms 71 and 73 and the base arm 62a and 62 arise. The sliding plate or the sealing ring 11 is both in the area of the support bracket 15 and in the area of the rolled-up spring arm part 71 b against the container wall pressed. From a certain, minimum annular gap 9, the free end of the curled spring arm part 71 b against the floating ceiling outer wall 8 and performs a strong resistance to further ring gap reduction. The curled up end 71b of the spring arm 71 thus replaces an otherwise necessary construction part Minimum limitation of the annular gap 9. The diameter of the semi-circular curled The spring end 71b of the spring arm 71 is selected to be larger than the smallest, aimed for Annular gap width 9. The Y-shaped used in this third embodiment Scissor support structure 62a, 62b, 67 enables a low overall height of the support and pressure unit.

This makes it possible to directly above the liquid level 4 between the sealing ring 11 and the floating ceiling outer wall 8 an extending, primary sealing membrane Arrange 74, the purpose of which is the vapor space above the liquid level 4 downsize and improve the seal.

In Figure 4 is a seal assembly 90 of a fourth embodiment with an X-shaped Structure of the support and pressure unit, shown in a side view. On Base arm 91, which works in terms of its operation with those based on embodiments 1 to 3 described base arms is comparable, is at both ends with one Bend knees 91b and 91d, with which he on the one hand on the sealing ring 11 (via the Bend knee 91b) by means of screw connection 94 and on the other hand on the floating ceiling outer wall 8 (bending knee 91d) is firmly screwed by means of screw connection 95. At the lower fitting 95 is also the primary sealing membrane 74, which is also in Figure 3 is shown attached.

The base arm 91 in the form of the leaf spring bar additionally has a reinforcement spring 92 in the form of a doubling, which follows the bending knee 91b up to the Screw connection 95 extends. Due to the cross part 18, which is again present the base arm 91 is divided into an upper section 91a and a lower section 91c. On the cross member 18 are at each end extending downward first spring arm 97 via an intermediate piece 98 and a second one, which extends upwards second spring arm 99 attached, the second spring arm 99 a curled End 99b and the first spring arm 97 with an unspecified skid is provided. In principle, this structure of the sealing arrangement 90 corresponds to that the third embodiment shown in Figure 3, but without the scissor suspension element 67, which is provided in the embodiment of FIG to hang on its lower end only slidingly guided base arm 62. One embodiment as shown in Figure 4 has the advantage that all the support elements can simultaneously generate pressure forces (this results in a cost advantage) and due to the use of the bending knee, a compact design even with large annular gaps is possible.

Furthermore, an XX-shaped pressure unit is general in a side view in FIG designated by the reference numeral 145, shown, which are additionally used can to achieve a pressure point in the lower region of the sealing ring 11; this The pressure point lies below the liquid level 4 in the round container 1 filled liquid 3. This XX-shaped pressure unit 145 is explained in more detail with reference to the in Figure 8 illustrated eighth embodiment described below.

The seal assembly, designated 110, shown in Figure 5 and a fifth Embodiment represents, is in its structure and in its operation with the arrangement comparable to the fourth embodiment in FIG. 4. While in the fourth embodiment the base arm 91 and the respective two first spring arms 97 and the respective second spring arms 99 are interconnected via the cross member 18 is in the fifth embodiment of Figure 5, the cross member 18 omitted. The entire, X-shaped The support and pressure unit is composed of two V-shaped parts. The a, V-shaped angled spring rod has an upper leg 111a, the upper Section of the base arm, and a lower portion 111b, which is a first Spring arm forms. This base arm portion 111a is provided with an end portion 111c Screw connection 114 is firmly connected to the upper region of the sealing ring 11. The lower part 111b of the spring bar lies with a slide shoe, not specified sliding on the sealing element 11.

The second, V-shaped angled spring bar comprises an upper spring bar section 113a, one second spring arm, comparable to the second spring arm 73 in FIG. 3 or the second spring arm 99 in Figure 4, forms and slides on the floating ceiling outer wall 8 rests in the upper area, while the second spring rod section 113b forms the lower part of the base arm and via a bending knee 113c and a screw connection 95 firmly on the floating ceiling outer wall 8 above the liquid level 4 connected is. All parts of the sections 111a and 113b forming the base arm and the first spring arm 111b and second spring arm 113a are made of a spring-hard Steel band made. In addition, the lower base arm portion 113b has a reinforcement spring 112 reinforced; this reinforcement spring 112 extends approximately to the middle the upper base arm portion 111a. The two V-shaped arrangements are over one Screw connection 116 connected to one another to form the X-shaped arrangement shown in FIG. The reinforcement spring can be attached by means of an additional screw connection 115 be connected at its upper end to the base arm portion 111a while, also having a bending knee 112c, together with the bending knee 113c on the attached lower end via the screw 95 on the floating ceiling outer wall 8 is. The fifth embodiment according to FIG. 5 offers the advantage that it can be pushed into one another the V-shaped spring bars a simple, compact and inexpensive construction the carrying and pressing unit becomes possible.

A sealing arrangement according to a sixth embodiment is shown in FIG. 6 and generally designated by reference numeral 120. In contrast to Figures 1 up to 5 here is the section of a typical swimming blanket in an open pan construction shown for a fixed roof tank. Therefore, the upper floor 7 and the reference number are missing 122, a stiffening plate of the floating ceiling outer wall 8 is shown. A such a floating blanket has only about half the wall height of the wall 8 compared to the Embodiments of Figures 1 to 5. This sixth embodiment sets accordingly the fifth embodiment, one composed of two V-shaped angled spring bars X-shaped support and pressure unit. In contrast to the embodiment 5 shows the respective legs of the angled spring bars in another Way assigned to the base arm and the first and second spring arms, by opening the V-shaped arrangements either upwards or downwards point below. The lower, angled spring rod, designated by reference number 126, forms with its one leg a lower one on the outer wall of the floating ceiling 8 adjacent portion 126c of the obliquely upward to the sealing ring 11 extending Base arm, while the other leg of the spring rod 126 is inclined forms downwardly extending portion 126a of the first spring arm. From the top, The left leg 123a forms the upper section in a V-shaped angled spring bar 123 of the base arm, while the right leg 123c represents the second spring arm. This section 123c is fixed via a screw connection 125 on the upper area the floating ceiling outer wall 8 attached. The leg 123a has a designated 123b Bend knee, the end with a screw connection 124 in the upper area the floating blanket 11 is attached. The two V-shaped spring parts 123 and 126 are with parts of sections 123a and 126c lying one above the other by means of screw connections 19 connected. With 123d and 126b, the two bending knees of the V-shaped angled spring bars Designated 123 and 126. This arrangement with a relatively simple and inexpensive The design of the support and pressure unit is suitable for light floating covers low height.

In FIG. 7, as in FIG. 6, a sealing arrangement is also designated by the reference symbol 130, for use on a light floating blanket for a fixed roof tank shown. Comparable with FIG. 2, there is the one lying against the container wall 2 Sealing ring made of a sliding plate 31 arranged in the area of the liquid 3 and a sealing membrane 42 arranged above, through a foam cushion element 43 and a receiving profile 40 which is connected to the sliding plate 31 by screw connections 41 is connected, is held in a vertical position.

While in Figures 1 to 6, the described support and pressure units with the Arms and elements are aligned vertically, are in Figure 7 support and pressure units shown, in which the individual units are each aligned horizontally, with a elements 141b and 151d comprising lower, supporting pressure unit, which is assigned to the sliding plate 31, and two upper ones, each comprising parts 131d and 141d, load-bearing pressure units on the mounting profile 40 above and below are attached. These load-bearing pressure units are shown in a top view in FIG. 8, wherein the representation in Figure 8 corresponds to the lower pressure unit in Figure 7, the is arranged between sliding plate 31 and floating ceiling outer wall 8.

The arrangement as shown in FIG. 8 in plan view comprises two X-shaped units, formed from two W-shaped spring bars, each of these units with the arrangement according to FIG. 5 is in principle comparable. Any of these X-shaped Unit includes one composed of legs 141b and 151b Base arm and a first spring arm 151a and a second spring arm 141a, which by means of Screw connection 156 are connected. Each W-shaped subunit, assembled each from parts 151a, 151e, 151b, 151a, 151b and parts 141b, 141a, 141d, 141a, 141b, comprises a bending knee, not specified. The connecting bridge 151e is shown with the sliding plate, which is shown in FIG. 8 to simplify the illustration and designated 31, horizontally slidably connected. The connecting bridge 141d is attached to the floating ceiling outer wall 8 by means of screw connection 142. The first spring arm 151a has a rolled end 151d, which is in a safety catch 134 is guided so that this rolled-up spring end is horizontal, i.e. in the drawing plane in Figure 8. The same applies to section 141b, which is the right part of the base arm, which is also guided in such a safety bracket 134. This arrangement not only has the function of pressing and centering, but also carries the sealing ring consisting of parts 31, 31a, 40, 42, 43. The further advantage of this Arrangement is that at a low height of the floating ceiling outer wall 8 a A variety of effective pressure units can be accommodated, making a high effective sealing arrangement is created.

FIG. 9 shows an eighth embodiment of a pressure unit, in the horizontal arrangement, in the annular gap 9, comparable to Figure 8, with two X-shaped units, however have no carrying function. In contrast to the seventh embodiment according to Figure 8 is therefore only the second spring arm 141a, with the connecting web 141d on the floating ceiling outer wall 8 by means of screw connections 142, while the base arm portion 141b with a slide shoe on the floating ceiling outer wall 8 is present. The other two legs of the respective X-shaped units, i.e. a spring arm 143b forming the second part of the base arm and the leg 143a, which forms the first spring arm, lie with the rolled-in spring end 143d and an unspecified sliding shoe on the sliding plate 31. The two X-shaped ones Units are made from two V-shaped and one W-shaped angled spring bar and screwed together by means of the screw connections 144 over a partial section. Such an arrangement, as shown in FIG. 9, is then used if by means of this pressure unit there are no vertical forces between the floating cover and Sealing ring to be transferred, the vertical forces from another structural part are to be transferred.

In Figures 8 and 9, both floating roofs and indoor swimming ceilings can be shown. The pressure devices of Figures 7 and 8 with the safety catch shown are suitable, as already mentioned, not only for pressing the sealing ring, but also to take over vertical forces and thus to wear the sealing ring or to support.

It should also be mentioned that it is particularly effective in terms of reducing emissions Pressure units are on the one hand in the area of the liquid level and secondly, create sealing forces at the upper end of the seal.

The spring arrangements shown in Figures 6 and 7 are particularly suitable to achieve low overall heights of the sealing arrangement, as is the case with indoor floating ceilings fixed roof tanks. Indoor floating ceilings have typical heights of about 400 mm, with annular gap widths of 200 mm. However, floating roofs have a height of about 900 mm with annular gap widths, which are also in the range of 200 mm.

Claims (17)

Device for sealing the annular gap between a container inner wall of a vertical round container intended for a liquid and a floating ceiling, with a circumferential sealing ring which bears against the container inner wall, with a number of sliding / sealing bodies arranged in the container circumferential direction with sealing surfaces extending in the vertical direction, with at least a circumferential sealing membrane bridging the annular gap between the sealing ring and an outer wall of the floating blanket and with a plurality of pressure units distributed around and attached to the circumference of the floating cover and fastened to it, which span the variable annular gap and press the sealing ring against the inner wall of the container at least at a first point, whereby at least some of these pressure units have at least one base arm which is arranged obliquely in the annular gap, extends between the sealing ring and the outer wall of the floating ceiling and at least on the sealing ring g or the outer wall of the floating blanket rests and its angular position relative to the sealing ring changes when the annular gap width is changed, the pressing of the sealing ring being supported by at least one first spring element and the first spring element and the base arm being connected to one another in such a way that when the annular gap becomes narrower the Pressure against the sealing ring is increased,
characterized in that the at least one first spring element (17; 37; 71; 97; 111b; 126a; 143a; 151a) forms at least part of a first pressure arm (17; 37; 71; 97; 111b; 126a; 143a; 151a) which presses the sealing ring (11; 31, 31a, 40, 40a, 42, 43; 31) against the container wall (2) at a second location which is spaced from the first location,
that the first pressure arm (17; 37; 71; 97; 111b; 126a; 143a; 151a) with the base arm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b ; 141b, 151b) is non-positively connected and the angular direction and length of the first pressure arm (17; 37; 71, 97; 111b; 126a; 143a; 151a) are dimensioned such that the first pressure arm (17; 37; 71; 97 ; 111b; 126a; 143a; 151a) for all annular gap widths in relation to the base arm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) in opposite directions Extends towards the sealing ring (11; 31, 31a, 40, 40a, 42, 43; 31) and slidably engages the sealing ring,
and wherein the base arm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) rotates in a first direction of rotation and the first pressure arm (17th ; 37; 71, 97; 111b; 126a; 143a; 151a) performs a rotary movement in a second direction of rotation opposite to the first direction of rotation. Apparatus according to claim 1, characterized in that a second spring element (38; 73; 99, 113a; 123c; 141b) forms at least part of a second pressure arm (38; 73; 99; 113a; 123c; 141b) which is connected to the base arm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) is positively connected, and the angular direction and length of the second pressure arm (38; 73; 99; 113a; 123c; 141b) are dimensioned such that the second pressure arm is in relation to the base arm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) extends in the opposite direction to the outer wall of the floating ceiling (8) and engages on it. Device according to claim 1 or 2, characterized in that the first (17; 37; 71, 97; 111b; 126a; 143a; 151a) and / or the second (38; 73; 99; 113a; 123c; 141b) pressure arm Spring rod is (are). Device according to claim 1 or 2, characterized in that the first (17; 37; 71, 97; 111b; 126a; 143a; 151a) and / or the second (38; 73; 99; 113a; 123c; 141b) pressure arm rigid arm part and a resilient arm part comprises (comprise). Device according to one of claims 1 to 4, characterized in that the first pressure arm (17; 37; 71, 97; 111b; 126a; 143a, 151a) approximately in the middle of the annular gap width on the base arm (12; 32; 62; 91 , 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) is attached. Device according to one of claims 2 to 5, characterized in that the second pressure arm (38; 73; 99; 113a; 123c; 141b) approximately in the middle of the annular gap width on the base arm (12; 32; 62; 91, 92; 111a) , 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) is attached. Device according to claim 2, characterized in that the first spring element (37; 71; 97) and the second spring element (38; 73; 99) have a continuous spring arm (37, 38, 39; 71, 72, 73; 97, 98 , 99), which is attached approximately in the middle of the spring arm in the middle of the base arm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b, 123, 126; 141b, 143b; 141b, 151b), whereby a End of the continuous spring arm (37, 38, 39; 71, 72, 73; 97, 98, 99) against the sealing ring (11; 31, 31a, 40, 40a, 42, 43; 31) and the other end of the spring arm against supports the outer surface of the floating ceiling (8). Apparatus according to claim 1 or 2, characterized in that a transverse part (18) is provided which is fastened with its center and at right angles to the base arm (32), the first and / or the second spring element (37, 38) on the one end of the cross member (18) is held and for this first and / or this second spring element a corresponding further first and / or second spring element (37, 38) is held at the other end of the cross member (18). Device according to one of claims 1 to 8, characterized in that the base arm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) is a spring bar. Device according to one of claims 1 to 9, characterized in that the base arm (91, 92; 111a, 112a, 112b, 113b; 123, 126) has a bending knee (91b; 91d; 112a, 113c; 123b) in the form of a U- Has shaped, resilient arm part and the free end of the bending knee is attached to the sealing ring (11) or the floating ceiling outer wall (8). Device according to claim 3, characterized in that the free end (71b; 99b; 143d; 151d) of the pressure arm (71; 99; 143a; 151a) is rolled in a semicircular shape, the diameter of the semicircle being larger than the smallest desired annular gap width. Apparatus according to claim 3, characterized in that the end of the pressure arm (131d; 141b; 151a, 151d) sliding against the sealing ring (31, 31a, 40, 40a, 42, 43; 31) or on the outer surface of the floating ceiling (8) ) is guided through a safety catch (134), the safety catch (134) being fastened to the sealing ring (31, 31a, 40, 40a, 42, 43; 31) or the outer wall of the floating ceiling (8), so that the pressure arm ( 131d; 141b; 151a, 151d) is fixed in its movement perpendicular to its longitudinal axis and can shift in the direction of its longitudinal axis. Device according to Claim 3, characterized in that the first (17; 37; 71; 97; 111b; 126a; 143a; 151a) and the second (38; 73; 99; 113a; 123c; 141b) pressure arm have two legs (37, 38; 71, 73; 97, 99; 111b, 113a; 126a, 123c; 143a, 141a; 151a, 141a) form an X-shaped arrangement, the other two legs (32a, 32b; 62a, 62b; 91a / 92a , 91c / 92c; 111a / 112a, 112b / 113b; 123a; 126c; 143b, 141b; 151b, 141b) of the X-shaped arrangement the base arm (32; 62; 91, 92; 111a, 112a, 112b, 113b; 123a , 123b, 126c; 143b, 141b; 151b, 141b). Apparatus according to claim 13, characterized in that a pressure arm (111 b; 113a) and a base arm leg (111a, 112a; 112b, 113b) each have a V-shaped unit (111a, 112a, 111b; 113a, 112b, 113b ) form, the legs (111a, 112a; 111b) of one unit being assigned to the sealing ring (11) and the legs (113a; 113b, 112b) being assigned to the other unit of the outer surface of the floating ceiling (8). Device according to claim 13, characterized in that two X-shaped pressure units are arranged directly one behind the other in their longitudinal axis, the two spring arms (141a, 141a) adjacent to the outer surface of the floating ceiling (8) having a connecting web (141d) and the fastening of the two pressure units with the floating ceiling outer wall (8) on the connecting web (141d). Apparatus according to claim 13, characterized in that two X-shaped pressure units are arranged directly one behind the other in their longitudinal axis, the respectively adjacent spring arm / base arm legs (141a, 141a / 151b, 151b) on the outer surface of the floating ceiling (8) and on the sealing ring (31) each have a connecting web (141d; 151e) and the pressure units are attached to the floating blanket on the floating web-side connecting web (141d) and the connecting web (151e) is guided on the sealing ring (31) in a safety catch (152) , Apparatus according to claim 3, characterized in that the spring bars are made of spring-hard steel strip and preferably have a thickness between 2-3 mm.

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